1,720,953 research outputs found
ResGhostU-Net: U-Net compacta para segmentação de eucalipto em imagens multiespectrais da Sentinel-2
No full textThe mapping of eucalyptus using remote sensing images can be an inaccurate and laborious process, especially when considering the large-scale multitemporal analysis of images. To try to solve this problem, new machine learning approaches have been proposed. In this work, we propose a compact modified U-Net (ResGhostUNet) for the task of semantic segmentation of eucalyptus using Sentinel-2 satellite images. In addition to the simplified architecture that has a reduced number of filters and depth and downsampling convolutions, we introduce the Ghost Residual Block, which allows reducing the computational cost and increasing the training efficiency. This study uses a new dataset that contains images of eucalyptus plantations in different cities in the Brazilian Cerrado biome. The quantitative and qualitative results demonstrate that the proposed method is highly competitive with respect to popular semantic segmentation methods. The ablation study highlights the effectiveness of the proposed component of the method. Furthermore, it demonstrates that using at least four selected bands yields slightly better results compared to utilizing all 13 bands. The proposed method consistently outperforms popular semantic segmentation methods, being simpler in terms of design, lightweight in terms of parameters, and fast in terms of processing. Due to these characteristics, ResGhostU-Net is potentially applicable for large-scale eucalyptus mapping using open-access satellite imagery.O mapeamento do eucalipto utilizando imagens de sensoriamento remoto pode ser um processo impreciso e trabalhoso, especialmente quando se considera a análise multitemporal de imagens em larga escala. Para tentar resolver este problema, novas abordagens de aprendizado de máquina foram propostas. Neste trabalho, propomos uma U-Net modificada compacta (ResGhostUNet) para a tarefa de segmentação semântica de eucalipto utilizando imagens do satélite Sentinel-2. Além da arquitetura simplificada que possui número reduzido de filtros e convoluções de profundidade e downsampling, introduzimos o Bloco Residual Fantasma, que permite reduzir o custo computacional e aumentar a eficiência do treinamento. Este estudo utiliza um novo conjunto de dados que contém imagens de plantações de eucalipto em diferentes cidades do bioma Cerrado brasileiro. Os resultados quantitativos e qualitativos demonstram que o método proposto é altamente competitivo em relação aos métodos populares de segmentação semântica. O estudo de ablação destaca a eficácia do componente proposto do método. Além disso, demonstra que a utilização de pelo menos quatro bandas selecionadas produz resultados ligeiramente melhores em comparação com a utilização de todas as 13 bandas. O método proposto supera consistentemente os métodos populares de segmentação semântica, sendo mais simples em termos de design, leve em termos de parâmetros e rápido em termos de processamento. Devido a estas características, a ResGhostU-Net é potencialmente aplicável para mapeamento de eucalipto em grande escala usando imagens de satélite de acesso aberto
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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